org.hibernate.PersistentObjectException: detached entity passed to persist

项目中用到自定义Hibernate主键生成策略，并且主键生成有一定的规则

一：Entity定义

package com.saving.ecm.resource.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.xml.bind.annotation.XmlRootElement;

import org.hibernate.annotations.GenericGenerator;
import org.hibernate.annotations.Parameter;

import com.saving.ecm.common.AbstractEntity;

/**
 * 数据中心基本信息表 注：数据中心代码由部里统一分配，项目开通前提交申请获取
 * 
 * @author lyl
 * @version 1.0
 */
@XmlRootElement
@Entity
@Table(name = "T_DC_DataCenterBaseInfo")
public class T_DC_DataCenterBaseInfo extends AbstractEntity {
	@Id
	@GeneratedValue(generator = "idGenerator")
	@GenericGenerator(name = "idGenerator", strategy = "com.saving.ecm.resource.keyGenerator.T_DC_DataCenterBaseInfo_KeyUtil", parameters = { @Parameter(name = "idLength", value = "6") })
	@Column(name = "F_DataCenterID", nullable = false, unique = true, columnDefinition = "char(6)  comment '数据中心代码由部里统一分配，用于唯一标识数据中心和数据中转站'")
	private String dataCenterID;

	@Column(name = "F_DataCenterName", nullable = false, columnDefinition = "varchar(48) default '' comment '数据中心名称'")
	private String dataCenterName;

	@Column(name = "F_DataCenterType", nullable = false, columnDefinition = "smallint default 1 comment '数据中心类型： 1 数据中心   2：数据中转站'")
	private short dataCenterType;

	@Column(name = "F_DataCenterManager", nullable = true, columnDefinition = "varchar(48) default '' comment '数据中心主管单位名称，最多24个汉字'")
	private String dataCenterManager;

	@Column(name = "F_DataCenterDesc", nullable = true, columnDefinition = "varchar(800) default NULL comment '用文字描述数据中心管理的城市数目、等信息'")
	private String dataCenterDesc;

	@Column(name = "F_DataCenterContact", nullable = true, columnDefinition = "varchar(48) default NULL comment '联系人'")
	private String dataCenterContact;

	@Column(name = "F_DataCenterTel", nullable = true, columnDefinition = "varchar(48) default NULL comment '联系电话'")
	private String dataCenterTel;



	public String getDataCenterID() {
		return dataCenterID;
	}

	public void setDataCenterID(String dataCenterID) {
		this.dataCenterID = dataCenterID;
	}

	public short getDataCenterType() {
		return dataCenterType;
	}

	public void setDataCenterType(short dataCenterType) {
		this.dataCenterType = dataCenterType;
	}

	public String getDataCenterManager() {
		return dataCenterManager;
	}

	public void setDataCenterManager(String dataCenterManager) {
		this.dataCenterManager = dataCenterManager;
	}

	public String getDataCenterDesc() {
		return dataCenterDesc;
	}

	public void setDataCenterDesc(String dataCenterDesc) {
		this.dataCenterDesc = dataCenterDesc;
	}

	public String getDataCenterContact() {
		return dataCenterContact;
	}

	public void setDataCenterContact(String dataCenterContact) {
		this.dataCenterContact = dataCenterContact;
	}

	public String getDataCenterTel() {
		return dataCenterTel;
	}

	public void setDataCenterTel(String dataCenterTel) {
		this.dataCenterTel = dataCenterTel;
	}

	public String getDataCenterName() {
		return dataCenterName;
	}

	public void setDataCenterName(String dataCenterName) {
		this.dataCenterName = dataCenterName;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.saving.ecm.common.AbstractEntity#getEntityId()
	 */
	@Override
	public String getEntityId() {
		return dataCenterID+"";
	}

}
           

二：主键策略类

package com.saving.ecm.resource.keyGenerator;

import java.io.Serializable;
import java.util.Properties;

import org.hibernate.dialect.Dialect;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.id.AbstractUUIDGenerator;
import org.hibernate.id.Configurable;
import org.hibernate.type.Type;

/**
 * @author lyl
 * @version 1.0
 */
public class T_DC_DataCenterBaseInfo_KeyUtil extends AbstractUUIDGenerator implements
		Configurable {
	public String idLength;
	public static String dataCenterID;

	public void configure(Type type, Properties params, Dialect d) {
		this.idLength = params.getProperty("idLength");
	}

	public Serializable generate(SessionImplementor session, Object obj) {

		return dataCenterID;
	}
}
           

三：单元测试

package com.test.persistence;

import com.saving.ecm.resource.dao.T_DC_DataCenterBaseInfoDAO;
import com.saving.ecm.resource.entity.T_DC_DataCenterBaseInfo;
import com.saving.ecm.resource.factory.PersistenceFactory;
import com.saving.ecm.resource.factory.PersistenceFactory.IPersistAction;
import com.saving.ecm.resource.factory.TransactionManagerFactory;
import com.saving.ecm.resource.keyGenerator.T_DC_DataCenterBaseInfo_KeyUtil;

public class TestPersistenceDataCenterBaseInfo {
	public static void main(String[] args) throws Throwable {
		TestPersistenceDataCenterBaseInfo bean = new TestPersistenceDataCenterBaseInfo();
		try {
			// 数据中心
			 bean.insertDataCenterBaseInfo();

		} finally {
			try {
				PersistenceFactory.clearEntityManagerFactory();
			} catch (Throwable e) {
				e.printStackTrace();
			}
		}
	}

	public void insertDataCenterBaseInfo() throws Throwable {
		IPersistAction action = null;
		try {
			T_DC_DataCenterBaseInfo dc = new T_DC_DataCenterBaseInfo();
			T_DC_DataCenterBaseInfo_KeyUtil.dataCenterID = "123456";
			//error:org.hibernate.PersistentObjectException: detached entity passed to persist
			//手动set主键，Hibernate对象是Detached（游离状态），persist持久化方法不支持detached对象
			dc.setDataCenterID("123456");
			dc.setDataCenterContact("刘彦亮");
			dc.setDataCenterDesc("描述");
			dc.setDataCenterManager("DataCenterManager");
			dc.setDataCenterTel("020-88888888");
			dc.setDataCenterName("DataCenterName");
			dc.setDataCenterType(Short.parseShort("1"));
			T_DC_DataCenterBaseInfoDAO dao = (T_DC_DataCenterBaseInfoDAO) TransactionManagerFactory.getDAO(T_DC_DataCenterBaseInfoDAO.class);
			action = PersistenceFactory.createPersistenceAction(PersistenceFactory.PersistenceUnitNative);
			action.transact();
			dc = dao.saveEntity(action.getEntityManager(), dc);
			action.flush();
		} catch (Exception ex) {
			ex.printStackTrace();
			if (action != null)
				action.rollback();
		} finally {
			if (action != null)
				action.close();
		}

	}

}
           

四：总结

手动set主键，Hibernate对象是Detached（游离状态），persist持久化方法（即save）不支持detached对象